One useful source is a 1939 list published by the SRD. I had previously taken notes on all the laws, but this combines them in one handy booklet.

Note that many of the legislatively-defined routes were never built or never acquired by the state. This is especially true of higher numbers.

397 to 449 were all in Orange County, and all added by the same law (1939 chapter 19049). Most were paved with asphalt in a 1926 county bond issue. I have included a column for these county numbers (associated names are also given), and those that were not in chapter 19049 are listed at the end. (Note that some numbers were skipped; these were assigned in early planning but did not make it to paving. I do not have a complete list of these, so they are not currently included here.) The law also extended 3-A south from Orlando along old 2 and redundantly redesignated 288 in Orange County.

A 1939 list published by the SRD lists the state roads from 1 to 545. I don't know if 546 to 549 were used (they may have been reserved for more airports). In 1941 the legislature began to add every tiny road to the system and the SRD stopped dutifully assigning numbers in sequence, so it's harder to determine where state roads 550+ were. The following are those I have found on maps and elsewhere, along with their post-1945 number (if any). One useful source is the 1943-44 biennial report.

Saturday, June 1, 2013

Semoran Boulevard (State Road 436) is a 25-mile 6+ lane corridor of sprawl connecting Orlando's mid-range suburbs. Although it is named as a portmanteau of Seminole and Orange, the two counties it passes through, the normal pronunciation is more like seh-muh-ron. (As far as I know, Semoran's lesser-known sibling, Oranole Road, does not have this problem.)

Semoran was initially conceived as a bypass around Orlando, combining existing roads into a partial beltway. According to "A Guide to Historic Orlando" (2006), the name was submitted by two people in a 1967 newspaper contest to name the road.

Wednesday, May 8, 2013

In 1941 the state legislature established a whole bunch of (potential)
state roads. That year, the State Road Department stopped assigning
numbers to all such proposed roads, only adding new numbers as roads
were taken over (or otherwise established?). Of course the renumbering
happened in 1945, entirely eliminating the numbers of many older
potential state roads. The following were designated in chapter 20279:

In 1941 the state legislature established a whole bunch of (potential) state roads. That year, the State Road Department stopped assigning numbers to all such proposed roads, only adding new numbers as roads were taken over (or otherwise established?). Of course the renumbering happened in 1945, entirely eliminating the numbers of many older potential state roads. The following were designated in chapter 20296; it seems that the first 40 or so had been paved by the county: